Exercise bar



FIG. 1 is a top, front, left perspective view of an exercise bar showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines showing the circular regions and the areas therein represent features that form no part of the claimed design. The broken lines depicting the remainder of the exercise bar show features that form no part of the claimed design. The exercise bar is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design. 

CLAIM The ornamental design for an exercise bar, as shown and described. 